670668640 has 24 divisors (see below), whose sum is σ = 1584455040. Its totient is φ = 268267392.

The previous prime is 670668629. The next prime is 670668659. The reversal of 670668640 is 46866076.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095680 + ... + 2095999.

It is an arithmetic number, because the mean of its divisors is an integer number (66018960).

Almost surely, 2^670668640 is an apocalyptic number.

It is an amenable number.

670668640 is an abundant number, since it is smaller than the sum of its proper divisors (913786400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670668640 is a wasteful number, since it uses less digits than its factorization.

670668640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191694 (or 4191686 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 670668640 is about 25897.2708986874. The cubic root of 670668640 is about 875.3250014466.

The spelling of 670668640 in words is "six hundred seventy million, six hundred sixty-eight thousand, six hundred forty".